One piece dual exhaust manifold for internal combustion engines



May 15, 1956 J. P. MARX 2,745,393

oNE PIECE DUAL EXHAUST MANIFOLD FOR INTERNAL COMBUSTION ENGINES Filed July 20, 1954 JOSEPH P. MA Ex United States Patent oNE PI c DUAL EXHAUSTMANIFOLD FGR INTERNAL COMBUSTION ENGINES Joseph Paul Marx,.Hartford, Wis.

Application-July 20,1954, Serial No 444,531

11 Claims. (Cl. 123 122) The invention relates to improvements in an exhaust manifold for internal combustion engines andis more particularly concerned with the novel construction and assembly of such-a manifold.

The standardone-piece exhaust manifold on aninternal combustion engine is, in most instances, provided with a heat riser to the carburetor. The provision of two exhausts, which is highly advantageous for several well-known reasons is now conventional in some V-8 internal combustion engines. There is at-present a trend to remove the originalone-piece exhaustmam'fold-on an in line engine and to substitute in its place'a pairof exhaust manifolds each to accommodate some to the cylinder exhauscportsand each havingits own; exhaust pipe, muilier and tail pipe. One such installation is shown in my Patent No. 2,6 67 ;l 1,igranted January 26, i951, wherein there is disclosed a two-piece exhaust manifold which retains the necessary heat-riser forthe carburetor. Certain types of in line internal combustion' engines are not susceptible of such installation but instead it is advantageous to retain the entire original exhaustmanifold, including its heat riser,.and to modify it in a manner that will divide the manifoldinto two sections or portions, each having some of the exhaust ports in communication therewith and each having its own exhaust outlet, exha'ust pipe, mufiienand tailpipe. It is therefore an object of the present invention to provide a one-piece dualexhaust-manifoldP Another object of the invention is to provide novel means to divide a conventionalrnanifoldinto two sections.

Auother object is toprovide-asimp'le, inexpensive and easily. installed divided exhaustmanifold i Another object is to provide a novel partition for an exhaustmanifold and novel means for 'easily and quickty mo'untin g the partition-in-place securely With the foregoing and other objects in view which will appear as the description proceeds, the invention consists of certain novel features of construction, arrangement and combination or parts hereinafter any de scribed, illustrated in the accompanying drawings, and particularly pointed out in the appended claims, it being understood that various changes in the form, proportion, size and minor etails of the structure may be made without departing from the spirit or sacrificing any of the advantages of the invention.

For the purposes of facilitating an understanding of my invention, 1 have illustrated in the accompanying drawings a preferred embodiment thereof, from an inspection of which, when considered in connection with the following description, my invention, its mode of construction, assembly and operation, and many of its advantages should be readily understood and appreciated.

Referring to the drawings in which the same characters of reference are employed to indicate corresponding or similar parts throughout the several figures of the drawings:

Fig. 1 is a side elevational veiw of an internal comice bustion engine showing the novelly reconstructed exhaust manifold thereon. n

Fig. 2- is a vertical sectionalview taken substantially on IineL-Zof Fig. 1.

Fig; 3 is a horizontal sectional viewtaken substantially online-33 of Fig; 2.

Fig. 4 is a verticallongitudinal sectional view taken substantially on line 4 4 of Fig. 2.

Referring particularly to Fig. 1 of the accompanying drawings, 11 schematically illustrates a six cylinder, in line, internal combustion engine provided with the usual intake manifold 12 which is connected in-the usual man'- ner to a carburetor 13. The engine 11 is-also provided with a substantially conventional exhaust manifold l t. The exhaust manifold 14 is in communication, through exhaust inlet ports 16, with the interior of the engine arid is provided with the usual exhaust port 17 to which is connected'the conventional exhaust pipe 18, asbv means of bolts i9passed through abutting flanges 211 The exhaust manifold l4 also includes a surface, indicated at 22, upon which a heat riser 23" to the carburetor 13 is mounted. This surface 22 is provided, in the manner best illustrated in Fig. 2, with an opening 24 communi eating with the exhaustrnanifold interior.

it is desired to reduce the volume of gases passing through the exhaust pipe 18 and thereby minimize the back pressure normal attendant to suchexhaust. To this end, the manifold 14 is divided in a manner to' be described presently so as to provide two sections o'r'portions 25 and 26 therein, e'a'ch of whi'ch' is in communication with some of the exhaust inlet ports 15. In the present disclosure there are three exhaust inlet ports 16 in communication with each portion of the exhaust manifold. The means provided for dividing'the" manifold into sections 25' and 26 is arranged substantially midway the length of the'manifold; I

More specifically, the division of the exhaust manifold is effected by mounting, within said manifold, a partition plate or barrier 27, which plate preferably" is inclined downwardly so as to direct exhaust gases" entering the manifold portion 26, in front of said partition, downwardly through a hole 23 cut in the bottom wall of'ex h'aus't manifold closely'adjacent to the partition'27'. The hole is' aligned with a secondexhaust pipe'2 9 which is secured to the manifold 14 as bybolts'pa'ssingthrough a flange 32 on the end of theexhau's't pipe 291. The bolts 31 extend entirely through bosses'ssrdrmed-nnuie manifold and constitute means-for securing the' heat riser 23 in place thereon. A. spacer block 34is arrangedb'e' tween the flange 32 arid'the'body'of manifoldfi.

Referring now more particularly to Figures 2 to} inclusive, the partition 27' consists of a" substantially rectangular shaped" plate which is inserted through the heat riser opening 24, after the riser has been removed temporarily during assembly. The plate 27 carries an eye-bolt 35 which extends loosely through said plate and is provided on its threaded end with a pair of lock nuts 36. The exhaust manifold 14 is further modified by tapping a hole in the bottom wall thereof adjacent to the exhaust pipe 2?. This hole is adapted to receive therethrough a bolt 37, which extends through the eye 38 of the eye-bolt 35 and-is securely locked against displacement by a lock nut 39. After the bolt 37 has extended through the eye 38 and securely locked in place, the lock nuts 36 are tightened on to the eye-bolt 35 to draw the plate 27 into the inclined position best illustrated in Figure 4 so that its upper and lower edges are seated firmly against the opposed inside walls of the exhaust manifold.

The instant structure is such that it is relatively simple and inexpensive to convert and install the conventional exhaust manifold of the character disclosed herein. An enpreferably through the heat riser opening 24, and secured in place, whereupon the heat riser is replaced and the second exhaust pipe 29 is secured by the heat riser bolts 31. Should the plate 27 not fit snugly, as will be the case in many instances owing to the rough interior surface of the exhaust manifold, any slight leakage between the two sections will serve to equalize the pressure between the two manifold sections 25 and 26 and will in no way interfere with the functioning of the exhaust manifold as a dual manifold having dual exhausts.

It is believed that my invention, its mode of construction 'and'assembly, and many of its advantages should be readily understoodfrorn the foregoing without further description, and it should alsobe manifest that while a preferred embodiment of the invention has been shown and described for illustrative purposes, the structural details are nevertheless capable of wide variation within the purview of my invention as defined in the appended claims. t V r i What I claim and desire to secure by Letters Patent of'the United States is:

1. An exhaust manifold comprising, in combination, a

hollow elongated member having ports spaced along its length adapted to register with exhaust ports of an internalcombustion engine, a heat riser integral with said member, a partition dividing the interior of said member 'into two portions each containing some of said ports, means to secure said partition in place, and said member havingan exhaust'outlet adjacent one end of and communicating with one of said portions and a second exhaust outlet adjacent the partition and communicating with the other portion, '7 e 2..An exhaust manifold of the character recited in claim 1, in which themeans to secure thepartition in place consists of an eye-bolt carried by said partition and a bolt in the manifold engaging the said eye-bolt.

3. An exhaust manifold of the character recited in claim '1, in which the means to secure the partition in place consists of an eye-bolt carried by said partition and a bolt in the manifold engaging said eye-bolt, and means engaging the eye bolt to draw the plate in place tightly.

4. In an internal combustion engine having a plurality of exhaust ports on one side of its cylinder block and a fuel carburetor, an exhaust manifold communicating with said exhaust ports, a heat riser on said manifold upon 7 As amatter of fact, such leakage, if any, will function to stabilize or equalizethe pressures in the sections 25 and 26.

which the carburetor is mounted, a partition in said manirecited in claim 4, in which the partition consists of a 9 plate secured in the interior of said manifold.

7.In an internal combustion engine of the character recited in claim 4, in which the manifold consists of an elongated hollow structure and the heat riser and parti- 7 tion are located substantially midway of its length,

8. In an internal combustion engine of the character recited in claim 4, in which themanifold has one of its exhaust outlets adjacent one of its ends and the other substantially midway between its ends.

9. In combination with a internal combustion engine having exhaust ports, an exhaust manifold having inlet ports spaced along its length adapted to register with the said exhaust ports, a heat riser on said manifold, a partition in said manifold dividing it into two sections each containing-some of said inlet ports, and exhaust outlets in said manifold one communicating with each section.

10. An exhaust manifoldeomprising, in combination,

a hollow elongated body having ports spaced along .its length adapted to register with exhaust ports of an internal combustion engine, a partition dividing the interior of the body intotwo sections each containing some of said ports, means to secure said partition immovably in place which comprises an eye-bolt carried by said partition and a bolt in the manifold engaging said eye-bolt, and said body having exhaust outlets one communicating with eachsection. V g

11. An exhaust manifold comprising, in combination, a hollow elongated body having'ports' spaced along its length adapted to register with exhaust ports of an internal combustion engine, a partition dividing the interior of the body into two'sections each containing some of said ports,

an eye-bolt carried by said partition, :1 bolt in the manifold engaging said eye-bolt-,-n1eans engaging the eye-bolt to draw the partition in place tightly, and said body having exhaust outlets one communicating with'each section.

References Cited the file of this, patent UNITED STATES PATENTS 

